Dust oqlleotob



L. 0.. STEVENS.- DUST COLLECTOR.

N0. 534,486. Patented Feb. 19, 1895.

(No ModeL) 2 sheetssheet 2.

L. O: STEVENS.

DUST COLLECTOR.

No. 534,486. r Patented Feb. 19,1895;

lll n' Ioaufip wry Llhfib'vus 0. Stevens,

gasses v 1 b s @Afia z s.

' THE norms versus 00.. PHOTO-LITHQ. wasmucmu. n. c.

NITED STATES PATENT OFFICE.

LIUEIOUS 0. STEVENS, o P oRIA, ILL NOIS, ASSIGNOR ,OF ONEHALE TO FREDERICK E. LEONARD, OF sAM PLACE.

DUST-COLLECTO R.

SPECIFICATION forming part of Letters Patent No. 534,486, dated February '19, 1895. Application filed May 26, 1894. Serial No. 512,551. (No model.)

To all whom b.7175 may concern:

Be it known that I, LIUEIOUS O. STEVENS, a citizen of the United States, residing at Peoria, in the county of Peoria and State of Illinois, have invented a new and useful Dust- Collector, of which the following is a specification.

This invention relates to dust collectors; and it has for its object to effect certain improvements in dust collectors of that character that are employed for collecting the dust from grist mills, elevator machines, planing mills, and the like.

To this end the main and primary object of the present inventionis to provide'an improved dust collector With certain novel fea tures of construction, whereby the same shall be rendered more efficient to insure an effective separation of the dust, by securingtwo separate and distinct separations, whereby the light dust that ordinarily escapes with the air back into the room again is caught and separated from the air before it finally issues from the machine into the room.

With these and other objects in view, which will readily appear as the nature of the invention is better understood, the same consists in the novel construction, combination,

and arrangement of parts hereinafter more fully described, illustrated,'and claimed.

In the accompanying drawings:Figure 1 is a perspective view of a dust collector constructed in accordance with this invention. Fig. 2 is a central vertical longitudinal sectional'view thereof. Fig. 3 isavertical trans verse sectional view on the line aa-m of Fig. 2.

Fig. 4 is an enlarged detail sectional view showing a modified arrangement of the discharge spout for the lower ends of the vertical side dust fines.

Referring to the accompanying drawings, 1 designates a supporting frame consisting of suitably connected horizontal and upright frame pieces, and said supporting frame is adapted to support in an upright -position therein the circular collector casing 2. The circular collector casing 2, consists of the opposite parallel vertical sides 3, and a metallic casing rim 4, secured to and connecting the edges of said sides to complete the casing, and the joints or connections between the 'charge into the casing.

sides and rim of the'casing are air and dusttight in order that the proper separations of the dust from the air within the casing may not be interfered with.

The circular collector casing 2, is contracted below its center ,into the contracted or tapered dust pocket 5, into which the heavy dust carried into the casing together with the air, settles, and from which the dust escapes through the main bottom discharge spout 6, extended below the bottom point or apex of the said contracted or tapered dust pocket that opens thereinto. At the top the said col lector casing 2, is provided with the off-standlector'casing from the bottom of the inlet neck 7, is the .top guide plate 8, that guides the dust-ladenair to the proper point of displate 8, is supported in position within the upper end of the circular casing 2, on the supporting cleats 9, secured to the opposite sides of the casing, and at its inner end the said guide plate is curved downwardly as at 10, to conform with the curvature of the casing rim at that point, and by reason of this disposition and shape of the top guide plate, the dust laden air is carried to a point where it is discharged within the casing at one side of the periphery thereof.

The dust laden air that is directed into the top and one side of the collector casing is necessarily givena circular or rotary circulation by reason of the curvature of the inner end of the guide plate 8, and the casing rim 4, and is caused topass transversely'across the interior of the casing, to the opposite side from that where it enters, above the contracted dust pocket-5, and by reason of this circulation, most of the dust, including theheavier portions, is separated from the air current and settles into the pocket 5, out of which pocket it runs into the bottom discharge spout 6, and

'is directed into a suitable receptacle, or to any other point of discharge. The air cur- The said top guide rents which are relieved of most of thedust carried thereby, ascend within the circular collector casin g and pass over the opposite top sides of the open escape box 11, into such box.

The open escape box 11, is arranged at an intermediate point within the casing 2, between the top and bottom thereof, opposite the inner terminal of the plate 8 and comprises the opposite imperforate side walls 12, and the imperforate bottom plate 13, fromthe opposite side edges of which are extended the side walls 12, said box being preferably made of a single piece of sheet metal. By reason of its specific construction, the intermediately arranged escape box 11, is open at the top so as to freely communicate with the upper part or portion of the circular collector casing in order that the air currents 'carrying light dust may escape thereinto over the upper edges of the side walls 12, and the opposite ends of said intermediateescape box 11, are open, and

are fitted into the oppositely located side es cape openings 14, that are out in the opposite vertical sides 3, of the collector casing at an intermediate point.

The side escape openings 14, in which are fitted the opposite open ends of the escape box 11, open directly into the opposite vertical side dust flues 15. The opposite vertical side dust flues 15, are suitably secured to the opposite vertical sides 3, of the collector casing and extending up to the top of the casing terminate at their upper ends in the air discharge openings 16, through which the air passes back into the room or into the open air after having been completely relieved of the dust carried therewith into the casing.

The said opposite vertical side dust fines 15,

are provided at an intermediate point directly opposite the openings 14, communicating therewith, with the outwardly bowed or bulged portions 17, that form oif-standing air pockets 18, that provide sufficient space for the free escape of the air that is deflected downwardly from the openings 14, into the flues 15, by means of the downwardly curved deflector plates 19. The downwardly curved deflector plates 19, are arranged within the side dust flues 16, concentric with the bowed or bulged portion 17, and are secured at their upper edges as at 20, to the opposite sides of the casing 2, directly above the top of the openings 14, and being of the same width as the width of the fines 15, in one direction, serve to deflect the air and light dust carried therewith downwardly into the fines 15.

The light dust that is deflected downwardly, together with the air, by the deflectors 19, settles down into the bottom of said flues, while the air, now entirely freed from dust, escapes up and out through the upper ends of the fines 15, without carrying any dust therewith. The dust that is separated from the air in the fines l5, settles into the bottom contracted dust pockets 21, which serve to collect the dust and direct the same into the lower flue discharge spouts 22.

The flue discharge spouts 22, may be arranged on the outside of the main bottom discharge spout 6, of the pocket- 5, as illustrated in some of the figures of the drawings, while as illustrated in Fig. 4:, of the drawings, the lower ends of the dust pockets 21, may open directly into the main discharge spout 6, and communicate with the spouts 22, that are arranged within the spouts 6, at opposite sides thereof, and are separated from the opening of said main discharge spout by the vertical spout plates 23, arranged within the spouts 6 to form one of the walls of the spouts-22.

By reason of the construction herein described, it will be obvious that the dust collector will thoroughly eliminate the dust from the air before it is discharged again out of the machine, owing to the twodis'tinct and separate separations ,effected,.anditwill be understood that changes in the form, proportion and the minor details of construction, maybe resorted to without departing from the principle or sacrificing any of the fadvantages of this invention.

Having thus described the invention, what is claimed, anddesired to be secured by Letters Patent, is-- 1. In a dust collector, the circular casing having a bottom dust pocket andside escape openings at an intermediate point, an open escape box fitted at itsopen endsinsaid side openings, andmsidedust fines arranged at opposite sides of the casing, open at the top, and provided with bottom dust pockets, substantially asset forth.

2. In a dust collector, the circularrseparator casing having a bottom dust pocket, an upper inletopening,,andintermediate side escape openings,a transverse open escape box fitted at its openends insaid side openings, a curved guide plate arranged within the top of the casing and leading inwardly from the inlet opening, concentric with the casing rim to a point oppositetsaid escape box, andside dust flues arranged over the sideescape openings and provided with bottom dust pockets, substantially asset forth.

3. In a dust collector, a circularcollector casing provided with a tapered or contracted dust pocket at the bottom,a discharge spout leading from said dust pocket, an :upper inlet neck,and intermediate siderescape openings, atop guide plate extending inwardly within thecasing from the bottom of the inlet neck and provided with a curvedinner end concentric with the adjacent periphery of the casing, and opposite vertical side dust fines arranged at opposite sides of thecasing over said side escape openings, open atthe top or upper end, and provided at the bottom with contracted dust pockets and flue discharge spouts leading from said dust pockets,vsubstantially as set forth.

4:. In a dust collector, the collector casing having a bottom dust discharge, an upper inlet opening, and intermediate side escape openings, side dust flues arranged at opposite sides of the casing over said escape openings and open at their upper ends, and downwardly disposed deflectors arranged within said dust fines opposite said side escape openings, substantially as set forth. I

5. In a dust collector, a circular collector casin g provided with a bottom dust discharge opening, an upper inlet neck, and intermediate side escape openings, side dust fines arranged at opposite sides of the casing over said escape openings and provided at an intermediate point with outwardly bulged portions, and downwardly curved deflector plates arranged within said side dust flues and se-' cured at their upper ends to the opposite sides of the casing above said side escape openings, substantially asset'fort-h.

6. In a dust collector, a circular collector casing provided with'a bottom dust discharge, an upper inlet neck and intermediate side escape openings, side dust fiues arranged at opposite sides of the casing over said escape my own I have hereto affixed my signature in r the presence of two witnesses. v v LIUEIOUS O. STEVENS.

Witnesses:

J A. WHITE, G. G. GEIGER. 

